*2.8. Western Blotting*

Western blot was performed essentially as described [37,38]. Primary anti-HA IgG antibody (polyclonal, mouse, 1:5000; Invitrogen, Carlsbad, CA, USA) in blocking solution (5% milk/TBST solution) was used in conjunction with anti-mouse-AP IgG (polyclonal, goat, 1:1000; Dianova, Hamburg, Germany).
